Nearly two years ago we ran a nameberry contest asking you to guess the name of Ben Affleck and JenniferGarner‘s second child; now the challenge is to come up with the name of Affleck pal MattDamon and wife Luciana‘s fourth daughter, due to be born any minute.

Will the new baby’s name harmonize with her big sisters’ stylish Latinate names, or strike out in a new direction? Will the new baby have a surname as a middle name, as do Gia (Zavala is a common Spanish last name) and Matt himself (his is Paige), or, like Isabella, no middle name at all?

To everyone who guessed early and chose a boy’s name, before I heard the news that the baby is definitely a girl, you get another shot: I can tell who you are.

The person who guesses the new Matt Damon baby name correctly wins a full signed set of our baby name books, including The Baby Name Bible, Cool Names, Beyond Ava & Aiden and Cool Irish Names. If no one guesses the name exactly, we’ll choose the winner by whoever comes closest, in the opinion of the judges aka Pam and Linda.

A bit about the names of the Damons’ children: All three are rising in popularity and have a Latin feel, undoubtedly thanks to mom Luciana‘s Argentinean roots. Gia is a short form of such Italian names as Gianna, Giovanna, and Giada, first known in this country via 60s movie star GiaScala, born Giovanna. Most recently, it’s gained notoriety as the oldest stage-bound daughter of Real New Jersey Housewife Teresa Giudice.

Isabella, the Spanish and Italian version of Elizabeth, is both classic and mega-trendy – it’s now the most popular name in the U.S. Alexia, a more modern offshoot of Alexandra/Alexandria, has also been steadily rising along with other members of the Alex family.

Those characteristics offer some good clues to what the couple’s fourth baby might be named. Or do they?

Post your entries here; one to a customer. Since everyone started with first names only, let’s keep going that way. Check and make sure someone hasn’t already entered your guess, as the first one to claim a name will win the prize. Different spellings counted separately, so if someone has already guessed Sofia, you can guess Sophia. (But sorry, those two are already taken.)

Adding a middle name does not mean you get to reclaim a name — so if Sophia has already been guessed, you can’t guess Sophia Rose. You also can’t guess two names — i.e. “Sophia or Sofia” — or both guesses will be disqualified, though if you’ve made any of those mistakes before I wrote this — 7:19 a.m. EST on October 12 — you get to choose ONE of your “or” names or reguess if you’ve guessed a double name already guessed by someone else. The computer logs the time you post, so who gets what first is free from human error.

Phew! I better stop now or the rules will be longer than the entries. Everyone clear?

Entries accepted until the minute before the baby’s name is announced.

I took Spanish in high school, but that was so long ago that my ability to speak and understand the language is so poor that on a recent research trip to the country, I was forced to hire a translator and guide. That didn’t stop me from appreciating the beauty of the language, though, or of thinking what great names some of the Spanish words would make.

So with the help of my translator Isabella, I came up with the following list of Spanish words that might make wonderful names — at least for an American girl. In Spain, the whole word name thing hasn’t hit yet — and maybe once it does, they’ll prefer the English versions of these words as names.

One note: I’ve excluded here accents that may be authentically Spanish but that don’t work accurately with our database. And of course a few of these — Alba, Aurora, Blanca — are already used as names.

In southern Spain recently, researching Spanish baby names, I came up against the fact that Spain is a widely varied country with different languages and cultures — and different names depending on ethnicity and region.

Rather than simply Spanish baby names, there are Catalonian baby names and Basque names, names more popular in Galicia and those favored in Navarre. And of course names popular in Spain may be different from those used most widely in other Spanish-speaking countries, such as Mexico or Brazil.

Spanish baby names that are stylish today and may be ready for import to the U.S. include: